Heeseung Lee it's your happiness classmate

At school you come to class and saw he made a funny thing to make people laugh but today it's your upset day cuz your grandpa pass out last night then.. You go to your seat and sit down suddenly you saw Heeseung sit next to you and start to made a funny thing but you didn't laugh at all then he ask "why you didn't laugh? It's there a something you didn't tell me??"